Microsoft Internet Explorer 9 through 11 allows remote attackers to trick users into making TCP connections to a restricted port via a crafted web site, aka "Internet Explorer Security Feature Bypass Vulnerability."
https://euvd.enisa.europa.eu/vulnerability/EUVD-2016-4283
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2016/ms16-084